Just need to vent and need some advice please

Well my baby's father and I are not together but he did agree to be here for our baby when she is born today I get a phone call telling me he is going out of town to his other baby mama to be with his son for a few weeks well he knows I'm scheduled for a C-section on the 17 of October and he is saying he doesn't know if he is gonna have time to be there now really am I wrong for being pissed off and upset he also told me that he isn't going to pay child support because he is behind with his other two kids and that he isn't going to have anything left for himself and I haven't been able to work for a while due to complications with the pregnancy and we already got DNA done so he knows she is his